Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

9 hosts · 214 ms

HostCertsFirst seenLast seen
strauss.pl 5 2026-04-21 2026-10-07
www-qa.strauss.pl 6 2026-05-05 2026-10-07
www-sta.strauss.pl 6 2026-05-05 2026-10-07
kupon.strauss.pl 5 2026-09-09 2026-10-01
mail.kupon.strauss.pl 1 2026-09-14 2026-09-14
www.kupon.strauss.pl 5 2026-09-09 2026-10-01
help.strauss.pl 7 2026-04-22 2026-09-27
www-dev.strauss.pl 6 2026-05-05 2026-10-07
www.strauss.pl 5 2026-04-21 2026-10-07

Programmatic access: API GET /v1/hosts/strauss.pl (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/strauss.pl.